Re: Question on BIGGEST_ALIGNMENT in GCC on NetBSD/m68k

Jason Thorpe <[email protected]> Mon, 16 Jun 2025 07:43:02 -0700

Newsgroups	gmane.linux.ports.m68k,gmane.os.netbsd.ports.m68k,gmane.linux.debian.ports.68k
Message-ID	<[email protected]>

> On Jun 16, 2025, at 2:10 AM, Laurent Vivier <[email protected]> wrote:
> 
> I think you need to change the ABI type in the ELF header:
> https://fr.wikipedia.org/wiki/Executable_and_Linkable_Format

4-byte alignment binaries should have ELFOSABI_SYSV (0) (since that ABI spec is where the 4 byte alignment comes from).  If Linux/m68k is already using that, then those binaries are broken by definition.

Let’s hope existing Linux/m68k binaries are using ELFOSABI_LINUX / ELFOSABI_GNU (3) (sorry, I don’t have any handy to check).

If the existing binaries correctly label themselves has having the Linux-specific ABI, then this is trivial and there’s no reason to use a note to differentiate them.

-- thorpej